—Jack fell off the ladder yesterday，but he is all right now.

—What a lucky dog! He________ himself badly.

A．should injure

B．might injure

C．should have injured

D．could have injured

在刑事诉讼中，（）应当撤销案件。

A、情节显著轻微，危害不大，不认为是犯罪的

B、犯罪嫌疑人死亡的

C、犯罪已过追诉时效期限的

D、犯罪嫌疑人投案自首的